My C() has about 9000 kilometres on it now and i am averaging 45-50 MPG. Yes, i agree the tank is small,the first 2 bars take a while to disappear but the last 3 go quick.If your driving 80 to 100 km an hour (45-60 miles per hour) you will get awesome gas mileage. Above this it will lower exponentially. Driving at 120 km/h (70 miles per hour) u will notice a large decrease in gas mileage.